the EGR valve is just under the distributor cap
The transmission filter is not in the pan like most other vehicles. On a 1990 acura legend it's an inline filter kinda looks like a fuel filter but located by the radiator.
The diagnostic port is located on the passenger side of the car. It is at the dash under the carpet.
I used Valvoline VV155 MaxLife SAE 5w30 Motor Oil in my 1990 acura legend
i had a 1990 acura legend my blower motor was located under the passenger side dash board
Some parts are, the 2.7liter is but some of it's electrical components are not
thermostat help fan come on when the car is runnning, keep the engine from over heating
In the gas tank
Same place you check it if it is an A/T. If it is a manual there is a plug located near the top of the transmission.
Remove the belt from your 1990 Acura Legend alternator. Remove the wiring harness from the back of the alternator. Remove the alternator retaining bolts. Reverse the process to install the new alternator.
on the intake manifold you should see a vacuum line coming from it connecting to youe throttle body
on the passanger side of the valve cover......or it's that plastic thing with the 4 thick wires coming out of it
its probably the main relay that needs to be replaced